Paris St-Germain need to sell 60m euros (£52.9m) worth of players by the end of June, to comply with financial fair play (FFP) rules.
They were cleared of breaching FFP rules, but the French club’s transfer dealings from last summer onwards will remain “under close scrutiny”.
Uefa opened an investigation into PSG’s spending in September.
It came after PSG broke the world record transfer fee in August 2017 when they signed Neymar for £200m.
They also signed Kylian Mbappe on loan, and could pay £165.7m for him this summer.
“The financial impact of transfer activities as from the 2017 summer – up to and including the upcoming transfer window – and compliance with the break-even requirement for the 2018 financial year will remain under close scrutiny and will be thoroughly looked at in the coming weeks,” Uefa said in statement.
European football’s governing body introduced FFP ‘break-even’ rules in 2013, requiring clubs to balance their spending with their revenue.
In closing the investigation, Uefa said the “break-even result of the club remains within acceptable deviation” for the past three financial years.
The seven-time French champions have been owned by the Gulf state of Qatar, via its Qatar Sports Investments fund, since 2011.
More to follow.